JP5304518B2 - Liquid crystal display panel and manufacturing method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display panel and a method for manufacturing the same.

Conventionally, for example, an ODF (One Drop Fill) method is known as a method for manufacturing a liquid crystal display panel of a liquid crystal display device. In the ODF method, when a TFT substrate on which various wirings and thin film transistors are formed is bonded to a CF substrate, a liquid crystal is dropped into a liquid crystal sealing region that is previously formed on the TFT substrate with a photo-curing sealant, and then vacuum is applied. Paste inside. After bonding, the pressure is returned to atmospheric pressure, the pressure difference between the inner region and the outer region surrounded by the sealing agent is used to spread the sealing agent between the TFT substrate and the CF substrate, and then the sealing agent is applied. The sealant is cured by irradiating with ultraviolet rays.
Here, there is a case where a black matrix as a light shielding film is formed on the peripheral portion of the CF substrate, and wiring is formed on a portion of the TFT substrate facing the black matrix. In this case, since a black matrix is formed on the CF substrate, it is necessary to irradiate ultraviolet rays from the TFT substrate side, but among the sealing agents, the wiring of the TFT substrate is interposed between the ultraviolet light source and the sealing agent. The sealant cannot be cured in the region.

  In order to prevent this, in recent years, ultraviolet rays are incident on the surfaces of the bonded substrates from an oblique direction to cause multiple reflections between the substrates, and among the sealing agents, an ultraviolet light source and a sealing agent. A method of manufacturing a liquid crystal display panel in which a sealing agent is cured also in a region where a wiring of a TFT substrate and a black matrix are interposed between the two is considered (for example, see Patent Document 1).

JP 2004-4563 A

In the manufacturing method described in Patent Document 1, ultraviolet light incident in an oblique direction with respect to the surface of the bonded substrate is reflected several times by a light shielding film or metal wiring with a flat surface, and the sealing agent is irradiated with ultraviolet light. ing. In particular, a region adjacent to the liquid crystal in the sealant is irradiated with the ultraviolet ray after the intensity of the ultraviolet ray is attenuated as much as possible to prevent the ultraviolet ray from leaking to the liquid crystal side and causing the contamination of the liquid crystal. Since the invention described in Patent Document 1 uses ultraviolet light that has been multiple-reflected and attenuated as described above, the intensity of the ultraviolet light emitted from the light source is inevitably set high. When the intensity of the ultraviolet rays is set to be high in this way, the ultraviolet rays that are directly incident on the liquid crystal sealing region are reflected directly or on the surface of each substrate and reach the liquid crystal with high intensity, which contaminates the liquid crystal. The possibility that it will end up increases.
The problem of the present invention is that the sealing agent can be cured without increasing the ultraviolet ray, and as a result, when the sealing agent is cured, there is a possibility that the ultraviolet ray directly or reflects and reaches the liquid crystal with high intensity and contaminates the liquid crystal. It is providing the liquid crystal display panel which can harden | cure a sealing agent, and its manufacturing method, without raising.

In order to solve the above problems, according to one aspect of the present invention,
A first transparent substrate;
A second transparent substrate superimposed on the first transparent substrate with a liquid crystal layer and a sealing agent surrounding the liquid crystal layer interposed between the first transparent substrate,
Wiring interposed between the first transparent substrate and the sealant;
It is interposed between the second transparent substrate and the sealing agent so as to overlap the wiring, and is incident on the first transparent substrate from the side opposite to the side on which the second transparent substrate is disposed. Diffuse reflection layer that diffuses reflected light ,
A light shielding film that blocks light interposed between the second transparent substrate and the irregular reflection layer in a state of overlapping with the sealant ,
The end of the irregular reflection layer on the side where the liquid crystal layer is disposed with respect to the irregular reflection layer is more than the end of the light shielding film on the side where the liquid crystal layer is disposed with respect to the light shielding film. There is provided a liquid crystal display panel characterized in that the distance from the display area of the liquid crystal display panel is increased.

In the liquid crystal display panel, preferably, the irregular reflection layer overlaps the entire sealing agent.
In the liquid crystal display panel, preferably, the irregular reflection layer is continuously formed from a region overlapping with the liquid crystal layer to a region overlapping with the sealant .
In the liquid crystal display panel, preferably, the light shielding film overlaps the entire sealing agent.
In the liquid crystal display panel, preferably, the light shielding film is continuously formed from a region overlapping with the liquid crystal layer to a region overlapping with the sealant.
In the liquid crystal display panel, preferably, the light shielding film is formed from a region overlapping with the liquid crystal layer to an end of the second transparent substrate.
In the liquid crystal display panel, preferably, a metal film is formed on a surface of the irregular reflection layer facing the first transparent substrate.
Preferably, the liquid crystal display panel further includes a pixel electrode formed in a display region of the liquid crystal display panel in a state of being interposed between the first transparent substrate and the liquid crystal layer,
A drive circuit mounting region in which a drive circuit for driving a thin film transistor connected to the pixel electrode is mounted is formed in a protruding portion protruding from the second transparent substrate of the first transparent substrate,
The wiring is a lead wiring that connects a scanning line or a signal line connected to the thin film transistor to a gate terminal or a data terminal formed in the driving circuit mounting region.

According to another aspect of the invention,
A pixel electrode is formed in each display region of the plurality of liquid crystal display panels on one surface and has an area where a plurality of completed liquid crystal display panels can be formed, and wiring is provided outside the display regions. A first substrate preparation step of preparing a first substrate on which is formed;
A light-shielding film having an area capable of forming a plurality of completed liquid crystal display panels, a color filter layer being formed in each display region of the plurality of liquid crystal display panels on one surface, and blocking light; A second substrate preparing step of preparing a second substrate in which an irregular reflection layer disposed on the light-shielding film and irregularly reflecting light is formed outside each display region;
The display areas are surrounded on either the first substrate and the wirings of the first substrate, or on the second substrate and the irregular reflection layers of the second substrate. A sealing agent forming step of forming a photo-curable sealing agent with,
A liquid crystal disposing step of disposing liquid crystal in a region surrounded by each sealing agent in the first substrate or the second substrate;
A bonding step of bonding the first substrate and the second substrate in a state in which the respective sealing agents are overlapped with the respective wirings of the first substrate and the respective irregular reflection layers of the second substrate; ,
The saw including a light irradiating step of irradiating light toward the opposite side to the respective sealant from the first side to the second substrate is disposed against the substrate,
The second substrate preparation step is arranged on each light shielding film with respect to each light shielding film from the end on the side where the display region corresponding to each light shielding film is arranged. The end of the irregular reflection layer on the side where the display region corresponding to each light shielding film is arranged with respect to each irregular reflection layer is in a state of being separated from the display region corresponding to each light shielding film. There is provided a method for manufacturing a liquid crystal display panel, further comprising an irregular reflection layer forming step of forming the irregular reflection layers .

In the method for manufacturing a liquid crystal display panel, preferably, the second substrate preparation step includes an end portion on a side where a display region corresponding to each light shielding film is disposed with respect to each light shielding film among the light shielding films. Rather than the diffuse reflection layer disposed on each light shielding film, the end on the side where the display region corresponding to each light shielding film is disposed with respect to each diffuse reflection layer is located on each light shielding film. It further includes a diffused reflection layer forming step of forming each diffused reflection layer so as to be separated from the corresponding display area.
In the liquid crystal display panel manufacturing method, preferably, each light shielding film is formed on a flat surface of the second substrate,
In the irregular reflection layer forming step, a photosensitive resin is applied on each of the light shielding films, and then a number of minute irregularities are formed on each of the light shielding films by exposure and development, and then the number of minute irregularities is formed. Forming a metal film thereon.
In the liquid crystal display panel manufacturing method, preferably, each light shielding film is formed on a surface having irregularities of the second substrate,
The irregular reflection layer forming step includes forming a metal film on each light shielding film.
In the manufacturing method of the liquid crystal display panel, preferably, the surface of the second substrate having the unevenness is formed by frosting the surface of the second substrate using a hydrofluoric acid solution. Including.
Preferably, the method for manufacturing a liquid crystal display panel includes forming each of the irregular reflection layers by removing a part of the metal film by exposure and development after forming the metal film.
In the method for manufacturing a liquid crystal display panel, preferably, the bonding step includes the second substrate and the first substrate in a state where the entire sealing agent is overlapped with the irregular reflection films on the second substrate. Including bonding to the substrate of
In the light irradiation step, the light irradiated toward the sealant from the light source disposed on the side opposite to the side on which the second substrate is disposed with respect to the first substrate is irregularly reflected by the irregular reflection layer. And irradiating a portion of each of the sealing agents where the wirings are interposed between the light sources.
In the method for manufacturing a liquid crystal display panel, preferably, the light irradiation step is a side where the second substrate is disposed with respect to the first substrate before irradiating the light toward the respective sealing agents. And a mask for covering the areas forming the respective display areas of the first substrate and blocking light from the light source.
In the liquid crystal display panel manufacturing method, preferably, after the light irradiation step, the liquid crystal display panel forming structure in which the first substrate and the second substrate are bonded together is cut into individual pieces. It further includes an individualization step.

According to another aspect of the invention,
A pixel electrode is formed in a display area of the at least one liquid crystal display panel on one surface and has an area where a completed at least one liquid crystal display panel can be formed, and wiring is provided outside the display area. A first substrate preparation step of preparing a first substrate on which is formed;
A light-shielding film having an area capable of forming a completed at least one liquid crystal display panel, and having a color filter layer formed in a display area of the at least one liquid crystal display panel on one surface to block light A second substrate preparing step of preparing a second substrate disposed on the light-shielding film and having a diffused reflection layer for irregularly reflecting light formed outside the display region;
Photocuring surrounding the display area on either the first substrate and the wiring of the first substrate, or on the second substrate and on the irregular reflection layer of the second substrate. A sealing agent forming step for forming a mold sealing agent;
A liquid crystal disposing step of disposing a liquid crystal in a region surrounded by the sealant in the first substrate or the second substrate;
A bonding step of bonding the first substrate and the second substrate in a state where the sealing agent is overlapped with the wiring of the first substrate and the irregular reflection layer of the second substrate;
The saw including a light irradiating step of irradiating light toward the opposite side to the sealant from the first side to the second substrate is disposed against the substrate,
The second substrate preparation step is arranged on each light shielding film with respect to each light shielding film from the end on the side where the display region corresponding to each light shielding film is arranged. The end of the irregular reflection layer on the side where the display region corresponding to each light shielding film is arranged with respect to each irregular reflection layer is in a state of being separated from the display region corresponding to each light shielding film. There is provided a method for manufacturing a liquid crystal display panel, further comprising an irregular reflection layer forming step of forming the irregular reflection layers .

  According to the present invention, the sealing agent can be cured without increasing the intensity of the ultraviolet rays. As a result, when the sealing agent is cured, the ultraviolet rays are directly or reflected to reach the liquid crystal with high intensity and contaminate the liquid crystal. The sealant can be cured without increasing the possibility.

It is a perspective view which shows schematic structure of the liquid crystal display panel with which the liquid crystal display panel of this embodiment is equipped. It is sectional drawing of the liquid crystal display panel seen from the II-II cutting line in FIG. It is a top view which shows a part of circuit formed on the TFT substrate of the liquid crystal display panel of this embodiment. It is a manufacturing-process figure of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows 1 process of the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows the optical path of the ultraviolet-ray in the light irradiation process in the manufacturing method of the liquid crystal display panel of this embodiment. It is explanatory drawing which shows the optical path of the ultraviolet-ray in the light irradiation process in the manufacturing method of the liquid crystal display panel without an irregular reflection film as a comparative example.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  First, the liquid crystal display panel formed by the liquid crystal display panel manufacturing method of the present embodiment will be described. FIG. 1 is a perspective view showing a schematic configuration of the liquid crystal display panel 1. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a plan view showing a part of a circuit formed on the TFT substrate 10. As shown in FIGS. 1 to 3, a liquid crystal display panel 1 includes a TFT substrate 10 having a glass substrate 11 as a first transparent substrate, a CF substrate 20 having a glass substrate 21 as a second transparent substrate, and a TFT. A sealant 30 is interposed between the substrate 10 and the CF substrate 20. The TFT substrate 10 has a shape having a protruding portion 10a protruding from the CF substrate 20 on at least one of the four sides, and a drive circuit 60 is mounted on the protruding portion 10a. The sealing agent 30 is formed in a frame shape along the outer peripheral edge of the CF substrate 20, and the liquid crystal layer 40 is sealed in a space formed by the sealing agent 30, the TFT substrate 10, and the CF substrate 20.

  The liquid crystal display panel 1 is an active matrix liquid crystal element using a thin film transistor (TFT) as an active element. In the display region G of the liquid crystal display panel 1 on the surface 12 (the inner surface of the TFT substrate 10) of the glass substrate 11 facing the CF substrate 20, pixels are formed by being arranged in a matrix in the row and column directions. A plurality of pixel electrodes 33, a plurality of thin film transistors 34 arranged corresponding to the plurality of pixel electrodes 33, respectively, and a plurality of thin film transistors 34 connected to the corresponding pixel electrodes 33, and a plurality of thin film transistors 34 in each row A scanning line 35 and a plurality of signal lines 36 for supplying data signals to the plurality of thin film transistors 34 in each column are provided. In addition, any one of a plurality of scanning lines 35 or a plurality of signal lines 36 is provided outside the display region G of the liquid crystal display panel 1 on the surface 12 of the glass substrate 11 facing the CF substrate 20 (inner surface of the TFT substrate 10). A plurality of lead wirings 13 connected to each other are formed. Each end portion of a part of the wiring lines 13 connected to the plurality of scanning lines 35 among the plurality of wiring lines 13 is arranged in the driving circuit mounting region 39 in which the driving circuit 60 is mounted in the protruding portion 10a. A terminal 37 is formed, and each end portion of the other part of the routing wiring 13 connected to the signal line 36 among the plurality of routing wirings 13 is arranged in the drive circuit mounting area 39 of the protruding portion 10a to be the data terminal 38. Is forming. Each of the plurality of routing wires 13 is formed so that the whole or a part thereof overlaps with the sealant 30. In FIG. 2, the protective film formed on the plurality of routing wirings 13 is not shown.

  On the other hand, the opposing surface (inner surface of the CF substrate 20) 22 of the glass substrate 21 with respect to the TFT substrate 10 has opposing electrodes (not shown) formed so as to oppose the entire array region of the plurality of pixel electrodes 33, and a plurality of There are provided color filter layers (not shown) of three colors of red, green, and blue, which are formed so as to correspond to a plurality of pixels each having a region in which the pixel electrode 33 and the counter electrode face each other. Then, the outer peripheral edge portion of the facing surface 22 of the glass substrate 21 is irradiated toward the liquid crystal display panel 1 from a backlight disposed on the opposite side of the TFT substrate 10 from the side on which the CF substrate 20 is disposed. A frame-shaped light-shielding film 23 that shields light is formed so as to surround the display region G. The light shielding film 23 is continuously formed on the opposing surface 22 of the glass substrate 21 so as to overlap the sealing agent 30 and from the region overlapping the liquid crystal layer 40 to the outer end 24 of the CF substrate 20.

In addition, an alignment film (not shown) that covers the electrodes is formed on the inner surfaces of the TFT substrate 10 and the CF substrate 20, respectively, and the liquid crystal molecules of the liquid crystal 40 are held in the initial alignment state and aligned by the alignment film. . Then, the drive circuit 60 mounted on the drive circuit mounting region 39 of the protruding portion 10 a sequentially applies gate signals to the plurality of scanning lines 35 via the gate terminals 37 and the plurality of signal lines 36 via the data terminals 38. A data signal is applied to. Further, a wiring film (not shown) for supplying a driver control signal from an external circuit (not shown) to the drive circuit 60 is connected to the end of the protruding portion 10a.
Here, in the liquid crystal display panel 1, the region excluding the outer peripheral edge portion of the region where the liquid crystal layer 40 is disposed, the plurality of thin film transistors 34 is formed, and is surrounded by the light shielding film 23 is the liquid crystal display panel 1. Display area G.

  Of the light-shielding film 23 facing the TFT substrate 10, the light is incident on a region excluding the edge on the side where the display region G is disposed with respect to the light-shielding film 23, that is, the inner peripheral edge of the frame-shaped light-shielding film 23 An irregular reflection layer 50 for irregularly reflecting the reflected light is formed. That is, the irregular reflection layer 50 of the irregular reflection layer 50 disposed on the light shielding film 23 rather than the end of the light shielding film 23 on the side where the liquid crystal layer 40 and the display region G are disposed with respect to the light shielding film 23. On the other hand, the end on the side where the liquid crystal layer 40 and the display area G are arranged is in a state of being separated from the display area G. Further, the irregular reflection layer 50 is continuously formed on the opposing surface of the light shielding film 23 from the region overlapping the liquid crystal layer 40 over the entire sealing agent 30 to the end 24 on the outer side of the CF substrate 20.

  The irregular reflection layer 50 is a metal film made of a metal such as aluminum or platinum, for example, and a large number of minute irregularities 51 are formed on the surface 51 facing the TFT substrate 10. By the irregular reflection layer 50, the light irradiated from the TFT substrate 10 side toward the light shielding film 23 is irregularly reflected. The irregular reflection layer 50 is provided so as to overlap at least all of the plurality of routing wires 13.

  Next, a manufacturing method of the liquid crystal display panel will be described with reference to a manufacturing process diagram of the liquid crystal display panel 1 shown in FIG. 5-12 is explanatory drawing which shows typically each process of the manufacturing method of a liquid crystal display panel. 5 to 12, illustration of the pixel electrode 33, the thin film transistor 34, and the alignment film of the TFT substrate 10, and the color filter layer and the alignment film of the CF substrate 20 are omitted.

  First, as shown in FIG. 5, a TFT substrate 10A having an area capable of forming a plurality of completed liquid crystal display panels 1 is prepared (first substrate preparation step S1). The TFT substrate 10A has a plurality of pixels in each display region G of the plurality of liquid crystal display panels 1 on the facing surface 12A of the glass substrate 11A having an area where a plurality of completed liquid crystal display panels 1 can be formed. An electrode 33, a plurality of thin film transistors 34, and an alignment film are formed, and a plurality of lead wirings 13 are formed outside each display region G of the plurality of liquid crystal display panels 1.

Thereafter, as shown in FIG. 6, a closed frame-like shape surrounding each display region G of the plurality of liquid crystal display panels 1 on the plurality of routing wirings 13 of the TFT substrate 10A and the opposing surface 12A of the glass substrate 11A. A plurality of photo-curing sealing agents 30 and a closed frame-shaped photo-curing outer peripheral sealing agent 31 surrounding all the sealing agents 30 are formed (sealing agent forming step S2). As the sealing agent 30, an ultraviolet curable sealing agent is used.
Next, as shown in FIG. 7, the liquid crystal 41 is dropped and arranged in each region surrounded by the plurality of sealing agents 30 on the facing surface 12A of the glass substrate 11A (liquid crystal arranging step S3).

  Then, as shown in FIG. 8, a CF substrate 20A having an area capable of forming a plurality of completed liquid crystal display panels 1 is prepared (second substrate preparation step S4). The CF substrate 20A has a color filter layer in each display region G of the plurality of liquid crystal display panels 1 on the facing surface 22A of the glass substrate 21A having an area where a plurality of completed liquid crystal display panels 1 can be formed. And a plurality of light shielding films 23 are formed outside the display regions G of the plurality of liquid crystal display panels 1. A light shielding film is formed on the glass substrate 21A of the CF substrate 20A so as to be disposed between the color filter layers of the respective colors. The light shielding film and the liquid crystal display panel 1 are formed outside the display areas G. The plurality of light shielding films 23 thus formed are formed at the same time.

  After that, as shown in FIG. 9, a closed frame-shaped irregular reflection layer 50 is formed on the plurality of light shielding films 23 of the CF substrate 20 </ b> A so that the inner peripheral edge portion is disposed outside the inner peripheral edge portion of each light shielding film 23. (Random reflection layer forming step S5). At this time, a photosensitive resin is applied on the flat light shielding film 23 formed on the flat surface of the CF substrate 20A, and then a large number of minute irregularities 51 are formed on the light shielding film 23 by exposure and development processing. Thereafter, a metal film made of a metal such as aluminum or platinum is formed on these minute irregularities 51 by plating. Thereafter, a part of the metal film is removed by exposure and development processing, and the edge of the light shielding film 23 on the side where the display region G is disposed with respect to the light shielding film 23 is opposed to the surface facing the TFT substrate 10. The irregular reflection layer 50 is formed in the excluded region so as to have a closed frame shape. That is, the irregular reflection layer 50 disposed on each light shielding film 23 from the end of each light shielding film 23 on the side where the display region G corresponding to each light shielding film 23 is disposed with respect to each light shielding film 23. Of these, the end on the side where the display regions G corresponding to the respective light shielding films 23 are arranged with respect to the respective irregular reflection layers 50 is separated from the display regions G corresponding to the respective light shielding films 23. Each diffused reflection layer 50 is formed.

  Thereafter, as shown in FIG. 10, the TFT substrate 10A and the CF substrate 20A are arranged with the opposing surface 12A of the TFT substrate 10A and the opposing surface 22A of the CF substrate 20A facing each other, and then aligned. 11, the CF substrate 20A is bonded to the TFT substrate 10A to form a liquid crystal display panel forming structure 70A (bonding step S6). At this time, the glass substrates 11A and 21A are aligned so that all of the plurality of routing wirings 13 and the plurality of sealing agents 30 of the TFT substrate 10A overlap with the irregular reflection layer 50 of the CF substrate 20A.

  After the bonding, as shown in FIG. 12, a mask 110 for blocking light is applied to the back surface 14A of the glass substrate 11A so as to cover at least the regions forming the display regions G of the glass substrate 11A of the TFT substrate 10A. To do. Thereafter, the light source 100 for irradiating ultraviolet rays is disposed on the opposite side of the glass substrate 11A of the TFT substrate 10A from the side on which the glass substrate 21A of the CF substrate 20A is disposed, and the liquid crystal display panel forming component 70A is disposed. By irradiating the ultraviolet rays, the ultraviolet rays emitted from the light source 100 pass through the glass substrate 11 of the TFT substrate 10 and reach the sealing agent 30 and the outer peripheral sealing agent 31, and the sealing agent 30 and the outer peripheral sealing agent 31 are cured ( Light irradiation step S7). At this time, since the mask 110 is disposed between the light source 100 and the region forming each display region G in the glass substrate 11A of the TFT substrate 10A, the ultraviolet rays from the light source 100 are directly incident on the liquid crystal layers 40. Can be prevented. Thereby, contamination of each liquid crystal layer 40 does not occur. The mask 110 has a plurality of light blocking portions that block light emitted from the light source 100, each light blocking portion overlaps at least the entire display region G, and the outer peripheral edge of each light blocking portion is each display region. Since it is continuously formed from the region overlapping G to the region overlapping each light-shielding film 23, the ultraviolet rays are directly applied from the oblique direction to each liquid crystal layer 40 in the portion of each liquid crystal layer 40 that overlaps with each display region G. It is also possible to prevent the incident light.

  Here, in the portion of the sealant 30 that is disposed so as to overlap with the plurality of routing wirings 13 and the plurality of routing wirings 13 are interposed between the light sources 100, the ultraviolet rays emitted from the light sources 100 are caused by the respective routing wirings 13. Since it will be interrupted | blocked, the ultraviolet-ray irradiated from the light source 100 will not reach | attain directly. Therefore, for example, as in the comparative example shown in FIG. 14, in the liquid crystal display panel 200 without the irregular reflection layer 50, the light emitted from the light source 100 is not reflected or is slightly reflected against the light shielding film 23. Therefore, the sealant 30 is cured without overlapping with the plurality of routing wirings 13 (P1 portion in FIG. 14), and the sealing agent 30 is connected with the plurality of routing wirings 13. Since they overlap, a portion that does not harden (P2 portion in FIG. 14) is mixed.

  On the other hand, in the liquid crystal display panel 1 in which the irregular reflection layer 50 is laminated on the light shielding film 23 as in the liquid crystal display panel 1 of the present embodiment, as shown in FIG. The ultraviolet rays incident on the surface of the sealing agent 30 are irregularly reflected by the irregular reflection layer 50, so that the ultraviolet rays can reach a portion of the sealant 30 where the plurality of lead wires 13 are interposed between the light source 100 and the sealing agent 30. As a result, the portion of the sealing agent 30 where the plurality of lead wires 13 are interposed between the light source 100 and the light source 100 can also be cured.

  In this case, the ultraviolet ray emitted from the light source 100 is reflected only once by the irregular reflection layer 50 without being reflected by the irregular reflection layer 50 or the plurality of routing wirings 13 a plurality of times, so In addition, since the ultraviolet ray can reach the portion where the plurality of routing wirings 13 are interposed, the sealing agent 30 can be cured without increasing the intensity of the ultraviolet ray, and the ultraviolet ray is directly applied when the sealing agent 30 is cured. Alternatively, the sealing agent 30 can be cured without increasing the possibility of being reflected and reaching the liquid crystal layer 40 with high strength and contaminating the liquid crystal layer 40.

  Thereafter, the TFT substrate 10A and the CF substrate 20A of the liquid crystal display panel forming structure 70A are cut into pieces by cutting means such as a glass cutter, whereby a plurality of liquid crystal display panels 1 shown in FIG. 1 are completed simultaneously. (Dividing step S8). In the individualization step, the TFT substrate 10 is cut so as to have a shape having a protruding portion 10a protruding from the CF substrate 20 on at least one side of the four sides. Thereafter, the drive circuit 60 is mounted on the protruding portion 10a.

As described above, according to the present embodiment, the sealing agent 30 can be uniformly cured even if the intensity of ultraviolet rays is suppressed.
Further, the sealing agent 30 can be cured without increasing the intensity of the ultraviolet rays emitted from the light source, and as a result, when the sealing agent is cured, the ultraviolet rays are directly or reflected to reach the liquid crystal with high intensity, The sealing agent 30 can be cured without increasing the possibility of contaminating the liquid crystal.
Furthermore, since the irregular reflection layer 50 is provided in a region other than the edge portion on the side where the display region G is disposed with respect to the light shielding film 23 on the opposing surface of the light shielding film 23, the irregular reflection layer 50 is provided on the light shielding film 23. Compared with the case where the opposite surface is formed up to the edge on the side where the display region G is disposed with respect to the light shielding film 23, the ultraviolet rays reflected by the irregular reflection layer 50 reach the liquid crystal layer in the display region G. The possibility of doing so can be reduced.

  Further, since the light shielding film 23 and the irregular reflection layer 50 are formed from the region overlapping the liquid crystal layer 40 in the glass substrate 21 of the CF substrate 20 to the region overlapping the sealing agent 30, ultraviolet rays incident from the liquid crystal layer 40 side are diffusely reflected. Thus, it is possible to reach the sealant 30.

  And since the light shielding film 23 is formed from the area | region which overlaps with the liquid crystal layer 40 in the glass substrate 21 of the CF substrate 20 to the edge part 24 of the outer side of the glass substrate 21, the CF substrate 20 is arrange | positioned with respect to the TFT substrate 10. The light irradiated toward the liquid crystal display panel 1 from the backlight disposed on the opposite side to the light-shielding side can be blocked to prevent light leakage from the backlight.

Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the above-described embodiment, the plurality of sealing agents 30 are formed on the glass substrate 11A of the TFT substrate 10A in the sealing agent forming step S2, and the plurality of sealing agents on the facing surface 12A of the glass substrate 11A in the liquid crystal arranging step S3. The liquid crystal 41 is dropped and arranged in each region surrounded by 30, but a plurality of sealing agents are formed on the glass substrate 21 </ b> A of the CF substrate 20 </ b> A and surrounded by the plurality of sealing agents on the facing surface 22 </ b> A of the glass substrate 21 </ b> A. Alternatively, the liquid crystal 41 may be dropped and disposed in each region. In this case, a plurality of closed frame-like photo-curing types surrounding each display region G of the plurality of liquid crystal display panels 1 on the plurality of irregular reflection layers 50 of the CF substrate 20A and the facing surface 22A of the glass substrate 21A. The sealing agent 30 and the closed frame-shaped photo-curing type outer peripheral sealing agent 31 surrounding all the sealing agents 30 are formed.
Further, the irregular reflection layer 50 may be formed by the following method. That is, before the second substrate preparation step, first, frost processing using a hydrofluoric acid solution is performed on at least the region where the irregular reflection layer 50 is formed in the facing surface 22A of the CF substrate 20A on which the irregular reflection layer 50 is formed. A CF substrate 20A having a large number of minute irregularities formed on the facing surface 22A is prepared. A color filter layer and an alignment film are formed in each display region G of the CF substrate 20A, and a light shielding film 23 is further formed. In a region corresponding to a large number of minute irregularities, the surface of the light shielding film 23 is formed in a shape having minute irregularities. Thereafter, a metal film made of a metal such as aluminum or platinum is formed on the minute unevenness of the light shielding film 23 by plating. Thereafter, a part of the metal film is removed by exposure and development processing, and the irregular reflection layer 50 is formed so that the inner peripheral edge becomes a closed frame shape arranged outside the inner peripheral edge of each light shielding film 23. You may do it.

1 Liquid crystal display panel 10, 10A TFT substrate (first substrate)
10a Protruding part 11, 11A Glass substrate (first transparent substrate)
12, 12A Opposite surface (one surface)
13 Lead wiring (wiring)
20, 20A CF substrate (second substrate)
21,21A glass substrate (second transparent substrate)
22,22A Opposite surface (one surface)
23 light shielding film 24 edge 30 sealing agent 33 pixel electrode 40 liquid crystal layer 41 liquid crystal 50 diffuse reflection layer 51 surface 100 light source 110 mask G display area

Claims (17)

A first transparent substrate;
A second transparent substrate superimposed on the first transparent substrate with a liquid crystal layer and a sealing agent surrounding the liquid crystal layer interposed between the first transparent substrate,
Wiring interposed between the first transparent substrate and the sealant;
It is interposed between the second transparent substrate and the sealing agent so as to overlap the wiring, and is incident on the first transparent substrate from the side opposite to the side on which the second transparent substrate is disposed. A diffuse reflection layer that diffuses reflected light ,
A light shielding film that blocks light interposed between the second transparent substrate and the irregular reflection layer in a state of overlapping with the sealant ,
The end of the irregular reflection layer on the side where the liquid crystal layer is disposed with respect to the irregular reflection layer is more than the end of the light shielding film on the side where the liquid crystal layer is disposed with respect to the light shielding film. A liquid crystal display panel characterized in that the distance from the display area of the liquid crystal display panel is long. The liquid crystal display panel according to claim 1,
The liquid crystal display panel, wherein the irregular reflection layer overlaps with the whole of the sealing agent. The liquid crystal display panel according to claim 1 or 2,
The liquid crystal display panel, wherein the irregular reflection layer is continuously formed from a region overlapping with the liquid crystal layer to a region overlapping with the sealant. In the liquid crystal display panel as described in any one of Claims 1-3 ,
The liquid crystal display panel according to claim 1, wherein the light shielding film overlaps the entire sealing agent. In the liquid crystal display panel as described in any one of Claims 1-4 ,
The liquid crystal display panel, wherein the light shielding film is continuously formed from a region overlapping with the liquid crystal layer to a region overlapping with the sealant. In the liquid crystal display panel as described in any one of Claims 1-5 ,
The liquid crystal display panel, wherein the light shielding film is formed from a region overlapping with the liquid crystal layer to an end of the second transparent substrate. In the liquid crystal display panel as described in any one of Claims 1-6 ,
A liquid crystal display panel, wherein a metal film is formed on a surface of the irregular reflection layer facing the first transparent substrate. In the liquid crystal display panel as described in any one of Claims 1-7,
A pixel electrode formed in a display region of the liquid crystal display panel in a state of being interposed between the first transparent substrate and the liquid crystal layer;
A drive circuit mounting region in which a drive circuit for driving a thin film transistor connected to the pixel electrode is mounted is formed in a protruding portion protruding from the second transparent substrate of the first transparent substrate,
The liquid crystal display panel, wherein the wiring is a lead wiring that connects a scanning line or a signal line connected to the thin film transistor and a gate terminal or a data terminal formed in the driving circuit mounting region. A pixel electrode is formed in each display region of the plurality of liquid crystal display panels on one surface and has an area where a plurality of completed liquid crystal display panels can be formed, and wiring is provided outside the display regions. A first substrate preparation step of preparing a first substrate on which is formed;
A light-shielding film having an area capable of forming a plurality of completed liquid crystal display panels, a color filter layer being formed in each display region of the plurality of liquid crystal display panels on one surface, and blocking light; A second substrate preparing step of preparing a second substrate in which an irregular reflection layer disposed on the light-shielding film and irregularly reflecting light is formed outside each display region;
The display areas are surrounded on either the first substrate and the wirings of the first substrate, or on the second substrate and the irregular reflection layers of the second substrate. A sealing agent forming step of forming a photo-curable sealing agent with,
A liquid crystal disposing step of disposing liquid crystal in a region surrounded by each sealing agent in the first substrate or the second substrate;
A bonding step of bonding the first substrate and the second substrate in a state in which the respective sealing agents are overlapped with the respective wirings of the first substrate and the respective irregular reflection layers of the second substrate; ,
The saw including a light irradiating step of irradiating light toward the opposite side to the respective sealant from the first side to the second substrate is disposed against the substrate,
The second substrate preparation step is arranged on each light shielding film with respect to each light shielding film from the end on the side where the display region corresponding to each light shielding film is arranged. The end of the irregular reflection layer on the side where the display region corresponding to each light shielding film is arranged with respect to each irregular reflection layer is in a state of being separated from the display region corresponding to each light shielding film. The method for producing a liquid crystal display panel further comprising a step of forming an irregular reflection layer for forming each of the irregular reflection layers . In the manufacturing method of the liquid crystal display panel of Claim 9 ,
Each of the light shielding films is formed on a flat surface of the second substrate,
In the irregular reflection layer forming step, a photosensitive resin is applied on each of the light shielding films, and then a number of minute irregularities are formed on each of the light shielding films by exposure and development, and then the number of minute irregularities is formed. A method for producing a liquid crystal display panel, comprising: forming a metal film thereon. In the manufacturing method of the liquid crystal display panel of Claim 9 ,
Each of the light shielding films is formed on a surface having irregularities of the second substrate,
The method of manufacturing a liquid crystal display panel, wherein the irregular reflection layer forming step includes forming a metal film on each of the light shielding films. In the manufacturing method of the liquid crystal display panel of Claim 11 ,
A method of manufacturing a liquid crystal display panel, comprising: forming a surface having the irregularities of the second substrate by frosting the surface of the second substrate using a hydrofluoric acid solution. . In the manufacturing method of the liquid crystal display panel as described in any one of Claims 10-12 ,
A method of manufacturing a liquid crystal display panel, comprising: forming the metal film by removing a part of the metal film by exposure and development after forming the metal film; In the manufacturing method of the liquid crystal display panel as described in any one of Claims 9-13 ,
The laminating step includes laminating the second substrate and the first substrate in a state where the whole of each sealing agent is overlapped with the respective irregular reflection films of the second substrate,
In the light irradiation step, the light irradiated toward the sealant from the light source disposed on the side opposite to the side on which the second substrate is disposed with respect to the first substrate is irregularly reflected by the irregular reflection layer. And a method of manufacturing a liquid crystal display panel, comprising: irradiating a portion of each of the sealing agents where the wirings are interposed between the light sources. In the manufacturing method of the liquid crystal display panel as described in any one of Claims 9-14 ,
In the light irradiation step, before irradiating light toward each of the sealing agents, the first substrate is placed on the side opposite to the side where the second substrate is disposed. A method of manufacturing a liquid crystal display panel, comprising: disposing a mask that covers a region forming each display region and blocks light from the light source. In the manufacturing method of the liquid crystal display panel as described in any one of Claims 9-15 ,
After the light irradiation step, the method further includes an individualization step of cutting and dividing the liquid crystal display panel forming structure in which the first substrate and the second substrate are bonded together. A method for manufacturing a liquid crystal display panel. A pixel electrode is formed in a display area of the at least one liquid crystal display panel on one surface and has an area where a completed at least one liquid crystal display panel can be formed, and wiring is provided outside the display area. A first substrate preparation step of preparing a first substrate on which is formed;
A light-shielding film having an area capable of forming a completed at least one liquid crystal display panel, and having a color filter layer formed in a display area of the at least one liquid crystal display panel on one surface to block light A second substrate preparing step of preparing a second substrate disposed on the light-shielding film and having a diffused reflection layer for irregularly reflecting light formed outside the display region;
Photocuring surrounding the display area on either the first substrate and the wiring of the first substrate, or on the second substrate and on the irregular reflection layer of the second substrate. A sealing agent forming step for forming a mold sealing agent;
A liquid crystal disposing step of disposing a liquid crystal in a region surrounded by the sealant in the first substrate or the second substrate;
A bonding step of bonding the first substrate and the second substrate in a state where the sealing agent is overlapped with the wiring of the first substrate and the irregular reflection layer of the second substrate;
The saw including a light irradiating step of irradiating light toward the opposite side to the sealant from the first side to the second substrate is disposed against the substrate,
The second substrate preparation step is arranged on each light shielding film with respect to each light shielding film from the end on the side where the display region corresponding to each light shielding film is arranged. The end of the irregular reflection layer on the side where the display region corresponding to each light shielding film is arranged with respect to each irregular reflection layer is in a state of being separated from the display region corresponding to each light shielding film. The method for producing a liquid crystal display panel further comprising a step of forming an irregular reflection layer for forming each of the irregular reflection layers .

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